Preparation process of waste porcelain ball high-wear-resistance chloride ion erosion-resistant marine concrete

Abstract

The invention discloses a preparation process of waste porcelain ball high-wear-resistance chloride ion erosion-resistant marine concrete, which comprises the following steps: (1) uniformly mixing mineral powder, glass powder, chopped basalt fiber and nano silicon dioxide, heating and sintering, crushing after completion, and curing the product in saturated lime water to obtain regenerated anti-cracking coarse aggregate; and (2) dipping the waste brick and tile powder in an ethanol mixed solution containing a hydrophobic agent, separating out a solid product after dipping, drying the solid product, uniformly mixing the solid product with a saturated solution containing a Fe < 2 + > and / or Fe < 3 + > source, drying, mixing with an alkali solution to form a wet material, and drying to obtain the hydrophobic anti-chlorine agent. And (3) mixing a cement binding material, a fine aggregate, waste porcelain balls, the regenerated anti-crack coarse aggregate, the hydrophobic anti-chlorine agent, a filler, a water reducing agent and water, and uniformly stirring to obtain the high-wear-resistance chloride ion erosion-resistant marine concrete. According to the process, the wear resistance of a concrete structure is effectively improved, and the prepared concrete also has good chloride ion erosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering concrete, and in particular to a preparation process of marine engineering concrete with high wear resistance and chloride ion corrosion resistance using waste porcelain balls. Background Art

[0002] Marine concrete refers to special concrete materials used in marine environments (such as coasts, submarine tunnels, offshore wind farms, offshore oil drilling platforms, etc.). Due to the particularity of the marine environment, marine concrete has long been attacked by harsh environmental factors such as seawater, waves, and tides. Therefore, marine concrete has better resistance to seawater scouring and seawater corrosion than ordinary concrete. This is because seawater contains a large amount of chloride ions, which will cause corrosion of steel bars after entering the concrete with seawater. On the one hand, it causes steel bar damage and mechanical properties to decrease. On the other hand, the volume expansion after the oxides are formed on the surface of the damaged steel bars causes cracks in the concrete, and the spalling of the concrete structure further leads to the invasion of chloride ions, which ultimately greatly shortens the service life of the concrete structure and even causes safety problems during service. At present, in order to improve the resistance of concrete to chloride ion erosion, one of the methods is to add a hydrophobic agent to the concrete structure, but this method will cause the hydration of the cement component in the concrete to be unable to proceed fully, resulting in a decrease in the strength of the concrete structure. In addition, the insufficient scouring resistance of marine concrete prepared based on traditional concrete is also an important reason for the reduction in the service life of concrete structures. Summary of the invention

[0003] The present invention provides a preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete, which uses waste porcelain balls with high wear resistance to effectively increase the wear resistance of the concrete structure, and at the same time, the concrete prepared by the present invention also has good resistance to chloride ion corrosion. Specifically, the technical solution of the present invention is as follows.

[0004] A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) The mineral powder, glass powder, chopped basalt fiber and nano-silicon dioxide are mixed and then heated and sintered. After completion, the mixture is cooled to room temperature and crushed. The obtained product is placed in saturated lime water for curing to obtain regenerated anti-cracking coarse aggregate.

[0005] (2) The waste brick and tile powder is placed in an ethanol mixture containing a saturated hydrophobic agent for immersion. After completion, the solid product is separated and dried and mixed with a Fe 2+ and / or Fe 3+ The saturated liquid of the source is mixed and then dried, and then mixed with the alkali solution to form a wet material and then dried to obtain a hydrophobic anti-chlorine agent.

[0006] (3) The cementitious material, fine aggregate, waste porcelain balls, the recycled anti-cracking coarse aggregate, the hydrophobic anti-chlorine agent, filler, water reducer and water are mixed and stirred evenly to obtain the highly wear-resistant and chloride-ion-resistant marine concrete.

[0007] Furthermore, in step (1), the ratio of the mineral powder, glass powder, chopped basalt fiber, and nano-silicon dioxide is 100-130 parts by weight: 46-70 parts by weight: 20-30 parts by weight: 5-8 parts by weight. Optionally, the length of the chopped basalt fiber is 5-20 mm.

[0008] Furthermore, in step (1), the heating and sintering temperature is 30-50° C. higher than the melting point of the glass powder, and the heating and sintering time is 15-30 min.

[0009] Furthermore, in step (1), the ratio of the product to saturated lime water is 1 g: 10-20 ml. Optionally, the curing time is 12-24 hours.

[0010] Furthermore, in step (1), the particle size of the recycled anti-cracking coarse aggregate is 5-15 mm.

[0011] Furthermore, in step (2), the ratio of the waste brick and tile powder to the mixed solution is 1 g: 5-10 ml. Optionally, the fineness of the waste brick and tile powder is 10-30 mesh.

[0012] Furthermore, in step (2), the hydrophobic agent includes at least one of perfluorooctyltrichlorosilane, octadecyltriethoxysilane, and the like.

[0013] Furthermore, in step (2), the immersion time is 5 to 30 minutes.

[0014] Furthermore, in step (2), the ratio of the solid product to the saturated liquid is 1 g: 1-1.5 ml. 2+ and / or Fe 3+ The source includes at least one of ferrous sulfate, ferric sulfate, ferrous nitrate, ferric nitrate, and the like.

[0015] Furthermore, in step (2), the ratio of the solid product to the alkali solution is 1 g: 0.7-1.0 ml. Optionally, the alkali solution includes at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc. The mass fraction of the alkali solution is 3-10%.

[0016] Furthermore, in step (3), the proportions of the components are: 440-500 parts by weight of cementitious material, 570-675 parts by weight of fine aggregate, 200-320 parts by weight of waste porcelain balls, 700-800 parts by weight of recycled anti-cracking coarse aggregate, 110-150 parts by weight of hydrophobic anti-chlorine agent, 50-80 parts by weight of filler, 6.5-10 parts by weight of water reducer, and 150-190 parts by weight of water.

[0017] Furthermore, in step (3), the particle size of the waste porcelain ball is 1-3 mm. The waste porcelain ball is a ceramic phase structure with aluminum oxide as the main component, which has the characteristics of high strength, high hardness, high wear resistance and acid and alkali corrosion resistance, and is generally used as a support and covering material for the catalyst in the reactor.

[0018] Furthermore, in step (3), the filler includes at least one of fly ash, mineral powder, silica ash, calcium carbonate, mica powder, etc. Optionally, the fineness of the filler is 300-500 mesh.

[0019] Furthermore, in step (3), the water reducer includes at least one of a polycarboxylate water reducer, a naphthalene-based water reducer, an aliphatic water reducer, a melamine-based water reducer, an aminosulfonate water reducer, and the like.

[0020] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects: First, waste porcelain balls with an alumina ceramic structure are added to the marine concrete prepared by the present invention, which effectively improves the wear resistance of the concrete structure, so that the marine concrete of the present invention has better resistance to seawater and tidal erosion and has a longer service life. Secondly, recycled anti-cracking coarse aggregate is added to the marine concrete of the present invention, which cements the mineral powder industrial solid waste into high-strength recycled aggregate, thereby improving the crack resistance of the concrete structure. This is because the basalt fibers distributed inside the regenerated anti-cracking coarse aggregate effectively improve the crack resistance of the aggregate and avoid the phenomenon of aggregate cracking and breaking. At the same time, the present invention also uses saturated lime water to maintain the regenerated aggregate. On the one hand, the nano-silicon dioxide reacts with calcium hydroxide to form hydrated calcium silicate to further improve the density and strength of the regenerated aggregate. On the other hand, the basalt fibers are more firmly combined with the aggregate matrix. At the same time, after the basalt fiber is activated at high temperature during the calcination process, its active surface reacts with the calcium hydroxide in the saturated lime water to form hydrated calcium silicate, which further improves the bonding force between the basalt fiber and the aggregate matrix and strengthens the crack resistance of the recycled aggregate. Again, a hydrophobic anti-chlorine agent is added to the marine concrete of the present invention, which effectively improves the concrete's ability to resist chloride ion penetration and erosion. This is because the hydrophobic agent is first loaded in the hydrophobic anti-chlorine agent, and then filled and encapsulated by ferric hydroxide and / or ferrous hydroxide. On the one hand, the premature release of the hydrophobic agent inside the hydrophobic anti-chlorine agent is reduced to affect the hydration of the cement component, thereby affecting the mechanical properties of the prepared concrete structure. On the other hand, the hydrophobic anti-chlorine agent is dispersed in the concrete structure. After encountering chloride ion corrosion in seawater, the iron hydroxide and / or ferrous hydroxide in the hydrophobic anti-chlorine agent are destroyed by chloride ion corrosion and converted into soluble chloride salts, thereby gradually releasing the hydrophobic agent in the hydrophobic anti-chlorine agent into the concrete structure to construct a hydrophobic system, preventing chloride ions from further penetrating with water. At the same time, this process retards the diffusion of chloride ions, thereby improving the concrete's resistance to chloride ion corrosion. In addition, for the hydrophobic anti-chlorine agent that has not been corroded by chloride ions, it still remains in an unconsumed state to be started, so that the marine engineering concrete prepared by the present invention can maintain the ability to resist chloride ion corrosion for a longer period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 The following is a compressive strength test diagram of Example 1.

[0023] Figure 2 The following are test diagrams of the chloride ion penetration resistance of Examples 1 to 6. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturer.

[0025] Unless otherwise defined, all professional and scientific terms used in the present invention have the same meanings as those familiar to those skilled in the art. The reagents or raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents or raw materials used in the present invention are used in a conventional manner in the art or in accordance with the product instructions.

[0026] In addition, any method and material similar or equivalent to the described content can be applied to the method of the present invention. The technical solution of the present invention is further described in conjunction with the accompanying drawings and specific embodiments.

[0027] Example 1 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Weigh the following raw materials: 120 parts by weight of mineral powder, 65 parts by weight of glass powder, 24 parts by weight of basalt fiber with a length of 10 mm, and 7 parts by weight of nano-silicon dioxide. Mix and stir the above raw materials evenly, then heat to 800°C (melting temperature of the glass powder is 740-760°C) at a heating rate of 15°C / min and keep warm for 20 minutes. After completion, cool to room temperature and crush, sieve out particles with a particle size of 5-10 mm, and let them stand for 18 hours with saturated lime water at a ratio of 1g:10ml for curing, then filter out the product, and dry it to obtain the regenerated anti-cracking coarse aggregate.

[0028] (2) Mix 20-mesh waste brick and tile powder with saturated ethanol mixture of perfluorooctyltrichlorosilane at a ratio of 1g:8ml and soak for 20 minutes. After completion, filter out the solid product, dry it, mix it with saturated iron sulfate solution at a ratio of 1g:1.2ml, stir it evenly, and then dry it. After completion, mix the dry product with 3% sodium hydroxide solution at a ratio of 1g:0.75ml and stir it evenly, then dry the obtained wet material to obtain a hydrophobic anti-chlorine agent.

[0029] (3) Weigh the following raw materials in the following proportions: 460 parts by weight of P.O42.5 cement, 605 parts by weight of river sand fine aggregate, 230 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 750 parts by weight of recycled anti-cracking coarse aggregate of this embodiment, 120 parts by weight of the hydrophobic anti-chlorine agent of this embodiment, 60 parts by weight of 400-mesh mineral powder filler, 8 parts by weight of polycarboxylic acid water reducer, and 170 parts by weight of water. Mix the above raw materials and stir evenly to obtain concrete material.

[0030] Performance Test: 1. The concrete material prepared in this embodiment is made into a concrete specimen, and after curing for 28 days, the compressive strength is tested according to the Standard for Test Methods for Physical and Mechanical Properties of Concrete (GB / T 50081-2019). Figure 1 The results are shown in the following table) and wear resistance.

[0031] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0032] Example 2 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Weigh the following raw materials: 100 parts by weight of mineral powder, 46 parts by weight of glass powder, 20 parts by weight of basalt fiber with a length of 5 mm, and 5 parts by weight of nano-silicon dioxide. Mix and stir the above raw materials evenly, then heat to 790°C (melting temperature of the glass powder is 740-760°C) at a heating rate of 15°C / min and keep warm for 30 minutes. After completion, cool to room temperature and crush, sieve out particles with a particle size of 5-10 mm, and let them stand for 12 hours with saturated lime water at a ratio of 1g:15ml for curing, then filter out the product, and dry it to obtain the regenerated anti-cracking coarse aggregate.

[0033] (2) Mix 30-mesh waste brick and tile powder with an ethanol mixture containing saturated perfluorooctyltrichlorosilane at a ratio of 1 g: 10 ml and soak for 5 minutes. After completion, filter out the solid product, dry it, mix it with saturated ferrous sulfate solution at a ratio of 1 g: 1.5 ml, stir it evenly, and then dry it. After completion, mix the dry product with 5% sodium carbonate solution at a ratio of 1 g: 1 ml and stir it evenly. Then dry the obtained wet material to obtain a hydrophobic antichloride agent.

[0034] (3) Weigh the following raw materials in the following proportions: 440 parts by weight of P.O42.5 cement, 570 parts by weight of river sand fine aggregate, 200 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 700 parts by weight of recycled anti-cracking coarse aggregate of this embodiment, 110 parts by weight of the hydrophobic anti-chlorine agent of this embodiment, 50 parts by weight of 300-mesh fly ash filler, 6.5 parts by weight of polycarboxylate water reducer, and 150 parts by weight of water. Mix the above raw materials and stir them evenly to obtain concrete material.

[0035] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0036] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0037] Example 3 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Weigh the following raw materials: 130 parts by weight of mineral powder, 70 parts by weight of glass powder, 30 parts by weight of 5 mm long basalt fiber, and 8 parts by weight of nano-silicon dioxide. Mix and stir the above raw materials evenly, then heat to 810°C (melting temperature of the glass powder is 740-760°C) at a heating rate of 10°C / min and keep warm for 15 minutes. After completion, cool to room temperature and crush, sieve out particles with a particle size of 10-15 mm, and let them stand for 24 hours with saturated lime water at a ratio of 1g:20ml for curing, then filter out the product, and dry it to obtain the regenerated anti-cracking coarse aggregate.

[0038] (2) Mix 10-mesh waste brick and tile powder with an ethanol mixture containing saturated octadecyltriethoxysilane at a ratio of 1 g: 5 ml and immerse for 30 minutes. After completion, filter out the solid product, dry it, mix it with saturated iron nitrate solution at a ratio of 1 g: 1 ml, stir it evenly, and then dry it. After completion, mix the dry product with 10% sodium hydroxide solution at a ratio of 1 g: 0.7 ml and stir it evenly. Then dry the obtained wet material to obtain a hydrophobic anti-chlorine agent.

[0039] (3) Weigh the following raw materials in the following proportions: 500 parts by weight of P.O42.5 cement, 675 parts by weight of river sand fine aggregate, 320 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 800 parts by weight of recycled anti-cracking coarse aggregate of this embodiment, 150 parts by weight of the hydrophobic anti-chlorine agent of this embodiment, 80 parts by weight of 500-mesh mica powder filler, 10 parts by weight of polycarboxylic acid water reducer, and 190 parts by weight of water. Mix the above raw materials and stir them evenly to obtain a concrete material.

[0040] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0041] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0042] Example 4 A preparation process of waste porcelain ball high wear-resistant and chloride ion resistant marine engineering concrete comprises the following steps: 460 parts by weight of P.O42.5 cement, 605 parts by weight of river sand fine aggregate, 750 parts by weight of recycled anti-cracking coarse aggregate of the above embodiment 1, 120 parts by weight of hydrophobic anti-chlorine agent of the above embodiment 1, 60 parts by weight of 400-mesh mineral powder filler, 8 parts by weight of polycarboxylate water reducer, and 170 parts by weight of water are mixed and stirred evenly to obtain concrete material.

[0043] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0044] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0045] Example 5 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Weigh the following raw materials: 120 parts by weight of mineral powder, 65 parts by weight of glass powder, and 7 parts by weight of nano-silicon dioxide. Mix and stir the raw materials evenly, then heat to 800°C (melting temperature of the glass powder is 740-760°C) at a heating rate of 15°C / min and keep warm for 20 minutes. After completion, cool to room temperature and crush, sieve out particles with a particle size of 5-10 mm, and let them stand for 18 hours with saturated lime water at a ratio of 1g:10ml for curing, then filter out the product, and dry it to obtain the regenerated anti-cracking coarse aggregate.

[0046] (2) Weigh the following raw materials in the following proportions: 460 parts by weight of P.O42.5 cement, 605 parts by weight of river sand fine aggregate, 230 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 750 parts by weight of recycled anti-cracking coarse aggregate of this embodiment, 120 parts by weight of the hydrophobic anti-chlorine agent of the above embodiment 1, 60 parts by weight of 400-mesh mineral powder filler, 8 parts by weight of polycarboxylate water reducer, and 170 parts by weight of water. Mix the above raw materials and stir them evenly to obtain concrete material.

[0047] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0048] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0049] Example 6 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Weigh the following raw materials: 100 parts by weight of mineral powder, 46 parts by weight of glass powder, 20 parts by weight of basalt fiber with a length of 5 mm, and 5 parts by weight of nano-silicon dioxide. Mix and stir the above raw materials evenly, then heat to 790°C (melting temperature of the glass powder is 740-760°C) at a heating rate of 15°C / min and keep warm for 30 minutes. After completion, cool to room temperature and crush, and sieve out particles with a particle size of 5-10 mm to obtain recycled anti-cracking coarse aggregate.

[0050] (2) Weigh the following raw materials: 440 parts by weight of PO42.5 cement, 570 parts by weight of river sand fine aggregate, 200 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 700 parts by weight of recycled anti-cracking coarse aggregate of this embodiment, 110 parts by weight of the hydrophobic anti-chlorine agent of the above embodiment 2, 50 parts by weight of 300-mesh fly ash filler, 6.5 parts by weight of polycarboxylate water reducer, and 150 parts by weight of water. Mix the above raw materials and stir them evenly to obtain concrete material.

[0051] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0052] 2. The concrete material prepared in this embodiment is made into concrete specimens, and after curing for 28 days, the anti-chloride ion penetration ability is tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). Figure 2 The results are shown in the following table.

[0053] Example 7 A preparation process of waste porcelain ball high wear-resistant and chloride ion erosion-resistant marine engineering concrete comprises the following steps: 500 parts by weight of P.O42.5 cement, 675 parts by weight of river sand fine aggregate, 320 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 800 parts by weight of recycled anti-cracking coarse aggregate of the above embodiment 3, 80 parts by weight of 500-mesh mica powder filler, 10 parts by weight of polycarboxylate water reducer, and 190 parts by weight of water. The above raw materials are mixed and stirred evenly to obtain concrete material.

[0054] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0055] 2. The concrete material prepared in this embodiment was made into concrete specimens. After curing for 28 days, the resistance to chloride ion penetration was tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). The results are shown in the following table.

[0056] Example 8 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) Mix 30-mesh waste brick and tile powder with an ethanol mixture containing saturated perfluorooctyltrichlorosilane at a ratio of 1 g:10 ml and soak for 5 minutes. After completion, filter out the solid product and dry it to obtain a hydrophobic anti-chlorine agent.

[0057] (2) Weigh the following raw materials in the following proportions: 440 parts by weight of P.O42.5 cement, 570 parts by weight of river sand fine aggregate, 200 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 700 parts by weight of the recycled anti-cracking coarse aggregate of the above-mentioned Example 2, 110 parts by weight of the hydrophobic anti-chlorine agent of this example, 50 parts by weight of 300-mesh fly ash filler, 6.5 parts by weight of polycarboxylate water reducer, and 150 parts by weight of water. Mix the above raw materials and stir them evenly to obtain a concrete material.

[0058] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0059] 2. The concrete material prepared in this embodiment was made into concrete specimens. After curing for 28 days, the resistance to chloride ion penetration was tested according to the "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete" (G / BT50082-2009). The results are shown in the following table.

[0060] Example 9 A preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete comprises the following steps: (1) 10 mesh waste brick and tile powder is mixed with ethanol at a ratio of 1g:5ml and then immersed for 30 minutes. After completion, the solid product is filtered out, dried and mixed with saturated iron nitrate solution at a ratio of 1g:1ml and stirred evenly, and then dried. After completion, the dry product is mixed with 10% sodium hydroxide solution at a ratio of 1g:0.7ml and stirred evenly, and then the obtained wet material is dried to obtain a hydrophobic antichloride agent.

[0061] (2) Weigh the following raw materials: 500 parts by weight of P.O42.5 cement, 675 parts by weight of river sand fine aggregate, 320 parts by weight of waste porcelain balls with a particle size distribution between 1 and 3 mm, 800 parts by weight of the recycled anti-cracking coarse aggregate of the above-mentioned Example 3, 150 parts by weight of the hydrophobic anti-chlorine agent of this example, 80 parts by weight of 500-mesh mica powder filler, 10 parts by weight of polycarboxylic acid water reducer, and 190 parts by weight of water. Mix the above raw materials and stir them evenly to obtain a concrete material.

[0062] Performance Test: 1. The concrete material prepared in this embodiment was made into a concrete specimen. After curing for 28 days, the compressive strength and wear resistance were tested according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019). The results are shown in the following table.

[0063] 2. The concrete material prepared in this embodiment was made into concrete specimens. After curing for 28 days, the resistance to chloride ion penetration was tested according to the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (G / BT 50082-2009). The results are shown in the following table.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A process for preparing marine engineering concrete with high wear resistance and chloride ion corrosion resistance using waste porcelain balls. It is characterized in that The steps include: (1) Mixing mineral powder, glass powder, chopped basalt fiber and nano-silicon dioxide, heating and sintering, cooling to room temperature and crushing, and curing the obtained product in saturated lime water to obtain regenerated anti-cracking coarse aggregate; (2) The waste brick and tile powder is placed in an ethanol mixture containing a saturated hydrophobic agent for immersion. After completion, the solid product is separated and dried and mixed with a Fe 2+ and / or Fe 3+ The saturated liquid of the source is mixed and dried, and then mixed with the alkali solution to form a wet material and then dried to obtain a hydrophobic anti-chlorine agent; (3) The cementitious material, fine aggregate, waste porcelain balls, the recycled anti-cracking coarse aggregate, the hydrophobic anti-chlorine agent, filler, water reducer and water are mixed and stirred evenly to obtain the highly wear-resistant and chloride-ion-resistant marine concrete.

2. The preparation process of the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (1), the ratio of the mineral powder, glass powder, chopped basalt fiber and nano-silicon dioxide is 100-130 parts by weight: 46-70 parts by weight: 20-30 parts by weight: 5-8 parts by weight; optionally, in step (1), the length of the chopped basalt fiber is 5-20 mm.

3. The preparation process of the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (1), the heating and sintering temperature is 30-50° C. higher than the melting point of the glass powder, and the heating and sintering time is 15-30 min.

4. The preparation process of waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (1), the ratio of the product to saturated lime water is 1 g: 10-20 ml; Optionally, in step (1), the curing time is 12 to 24 hours; Optionally, in step (1), the particle size of the recycled crack-resistant coarse aggregate is 5 to 15 mm.

5. The preparation process of the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (2), the ratio of the waste brick and tile powder to the mixed liquid is 1g: 5-10ml; Optionally, in step (2), the fineness of the waste brick and tile powder is 10-30 mesh; Optionally, in step (2), the hydrophobic agent includes at least one of perfluorooctyltrichlorosilane and octadecyltriethoxysilane.

6. The preparation process of the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (2), the ratio of the solid product to the saturated liquid is 1 g: 1-1.5 ml; Optionally, in step (2), the Fe 2+ and / or Fe 3+ The source includes at least one of ferrous sulfate, ferric sulfate, ferrous nitrate, and ferric nitrate; Optionally, in step (2), the immersion time is 5 to 30 minutes.

7. The process for preparing the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (2), the ratio of the solid product to the alkali solution is 1 g: 0.7-1.0 ml; Optionally, in step (2), the alkali solution includes at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate; Optionally, in step (2), the mass fraction of the alkali solution is 3-10%.

8. The process for preparing the waste porcelain ball highly wear-resistant and chloride ion-resistant marine engineering concrete according to claim 1, It is characterized in that In step (3), the proportions of the components are: 440-500 parts by weight of cementitious material, 570-675 parts by weight of fine aggregate, 200-320 parts by weight of waste porcelain balls, 700-800 parts by weight of recycled anti-cracking coarse aggregate, 110-150 parts by weight of hydrophobic anti-chlorine agent, 50-80 parts by weight of filler, 6.5-10 parts by weight of water reducer, and 150-190 parts by weight of water.

9. A process for preparing high wear-resistant and chloride ion-resistant marine engineering concrete made of waste porcelain balls according to any one of claims 1 to 8, It is characterized in that In step (3), the filler includes at least one of fly ash, mineral powder, silica ash, calcium carbonate, and mica powder; Optionally, in step (3), the fineness of the filler is 300-500 mesh; Optionally, in step (3), the particle size of the waste porcelain balls is 1-3 mm.

10. A process for preparing high wear-resistant and chloride ion-resistant marine engineering concrete made of waste porcelain balls according to any one of claims 1 to 8, It is characterized in that In step (3), the water reducer includes at least one of a polycarboxylate water reducer, a naphthalene-based water reducer, an aliphatic water reducer, a melamine-based water reducer, and an aminosulfonate water reducer.

Images